frozen: init at 1.1.1

pkgs/development/libraries/frozen/01-fix-gcc-build.patch

@@ -0,0 +1,26 @@
+diff --git a/include/frozen/unordered_set.h b/include/frozen/unordered_set.h
+index 4d16df9..196ea50 100644
+--- a/include/frozen/unordered_set.h
++++ b/include/frozen/unordered_set.h
+@@ -105,7 +105,7 @@ public:
+   /* lookup */
+   template <class KeyType, class Hasher, class Equal>
+   constexpr std::size_t count(KeyType const &key, Hasher const &hash, Equal const &equal) const {
+-    auto const k = lookup(key, hash);
++    auto const & k = lookup(key, hash);
+     return equal(k, key);
+   }
+   template <class KeyType>
+diff --git a/tests/test_unordered_set.cpp b/tests/test_unordered_set.cpp
+index e90a0d4..042c1a8 100644
+--- a/tests/test_unordered_set.cpp
++++ b/tests/test_unordered_set.cpp
+@@ -65,7 +65,7 @@ TEST_CASE("tripleton str frozen unordered set", "[unordered set]") {
+   constexpr auto max_size = ze_set.max_size();
+   REQUIRE(max_size == 3);
+
+-  constexpr auto nocount = ze_set.count(4);
++  const auto nocount = ze_set.count(4);
+   REQUIRE(nocount == 0);
+
+   constexpr auto count = ze_set.count(1);

pkgs/development/libraries/frozen/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, ninja
+}:
+
+stdenv.mkDerivation rec {
+  pname = "frozen";
+  version = "1.1.1";
+
+  src = fetchFromGitHub {
+    owner = "serge-sans-paille";
+    repo = "frozen";
+    rev = version;
+    hash = "sha256-HebDTRg1+snUwu+KumrgNMt/GOWXdHM9pMgXi51eArk=";
+  };
+
+  patches = [
+    # Version 1.1.1 fails to build with gcc
+    ./01-fix-gcc-build.patch
+  ];
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    homepage = "https://github.com/serge-sans-paille/frozen";
+    description = "a header-only, constexpr alternative to gperf for C++14 users";
+    license = licenses.asl20;
+    platforms = platforms.unix;
+  };
+}